mojo/services/view_manager/default_access_policy.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/services/view_manager/default_access_policy.h"
   6
   7 #include "mojo/services/view_manager/access_policy_delegate.h"
   8 #include "mojo/services/view_manager/server_view.h"
   9
  10 namespace mojo {
  11 namespace service {
  12
  13 DefaultAccessPolicy::DefaultAccessPolicy(ConnectionSpecificId connection_id,
  14                                          AccessPolicyDelegate* delegate)
  15     : connection_id_(connection_id),
  16       delegate_(delegate) {
  17 }
  18
  19 DefaultAccessPolicy::~DefaultAccessPolicy() {
  20 }
  21
  22 bool DefaultAccessPolicy::CanRemoveViewFromParent(
  23     const ServerView* view) const {
  24   if (!WasCreatedByThisConnection(view))
  25     return false;  // Can only unparent views we created.
  26
  27   return IsViewInRoots(view->parent()) ||
  28          WasCreatedByThisConnection(view->parent());
  29 }
  30
  31 bool DefaultAccessPolicy::CanAddView(const ServerView* parent,
  32                                      const ServerView* child) const {
  33   return WasCreatedByThisConnection(child) &&
  34          (IsViewInRoots(parent) ||
  35           (WasCreatedByThisConnection(parent) &&
  36            !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(parent)));
  37 }
  38
  39 bool DefaultAccessPolicy::CanReorderView(const ServerView* view,
  40                                          const ServerView* relative_view,
  41                                          OrderDirection direction) const {
  42   return WasCreatedByThisConnection(view) &&
  43          WasCreatedByThisConnection(relative_view);
  44 }
  45
  46 bool DefaultAccessPolicy::CanDeleteView(const ServerView* view) const {
  47   return WasCreatedByThisConnection(view);
  48 }
  49
  50 bool DefaultAccessPolicy::CanGetViewTree(const ServerView* view) const {
  51   return WasCreatedByThisConnection(view) || IsViewInRoots(view);
  52 }
  53
  54 bool DefaultAccessPolicy::CanDescendIntoViewForViewTree(
  55     const ServerView* view) const {
  56   return WasCreatedByThisConnection(view) &&
  57          !delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view);
  58 }
  59
  60 bool DefaultAccessPolicy::CanEmbed(const ServerView* view) const {
  61   return WasCreatedByThisConnection(view);
  62 }
  63
  64 bool DefaultAccessPolicy::CanChangeViewVisibility(
  65     const ServerView* view) const {
  66   return WasCreatedByThisConnection(view) || IsViewInRoots(view);
  67 }
  68
  69 bool DefaultAccessPolicy::CanSetViewSurfaceId(const ServerView* view) const {
  70   // Once a view embeds another app, the embedder app is no longer able to
  71   // call SetViewSurfaceId() - this ability is transferred to the embedded app.
  72   if (delegate_->IsViewRootOfAnotherConnectionForAccessPolicy(view))
  73     return false;
  74   return WasCreatedByThisConnection(view) || IsViewInRoots(view);
  75 }
  76
  77 bool DefaultAccessPolicy::CanSetViewBounds(const ServerView* view) const {
  78   return WasCreatedByThisConnection(view);
  79 }
  80
  81 bool DefaultAccessPolicy::ShouldNotifyOnHierarchyChange(
  82     const ServerView* view,
  83     const ServerView** new_parent,
  84     const ServerView** old_parent) const {
  85   if (!WasCreatedByThisConnection(view))
  86     return false;
  87
  88   if (*new_parent && !WasCreatedByThisConnection(*new_parent) &&
  89       !IsViewInRoots(*new_parent)) {
  90     *new_parent = NULL;
  91   }
  92
  93   if (*old_parent && !WasCreatedByThisConnection(*old_parent) &&
  94       !IsViewInRoots(*old_parent)) {
  95     *old_parent = NULL;
  96   }
  97   return true;
  98 }
  99
 100 bool DefaultAccessPolicy::IsViewInRoots(const ServerView* view) const {
 101   return delegate_->GetRootsForAccessPolicy().count(
 102              ViewIdToTransportId(view->id())) > 0;
 103 }
 104
 105 }  // namespace service
 106 }  // namespace mojo